Photosynthetic response of tomato plants to vascular wilt diseases

Lorenzini, Giacomo; Guidi, Lucia; Nali, Cristina; Ciompi, Stefania; Soldatini, Gianfranco

doi:10.1016/s0168-9452(97)04600-1

Cited by 73 publications

(57 citation statements)

References 12 publications

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“…This result agrees with data reported for other plant species (Bowden et al 1990;Goicoechea et al 2001;Haverkort et al 1990;Lorenzini et al 1997;Pennypacker et al 1990;Sadras et al 2000;Saeed et al 1999). Vascular wilt pathogens decrease plant hydraulic conductance due to plugging of the xylem vessels by the fungus, which may lead to leaf water deficits (Adams et al 1987).…”

Section: Discussionsupporting

confidence: 91%

“…This contention is based on results from Pomar et al (2004), who reported strongly damaged photochemical processes in Verticillium wilted pepper plants. In addition, we used in this work asymptomatic leaves for the physiological measurements, in order to minimize variability due to physiological imbalances caused by the distance from the point of colonization (Lorenzini et al 1997). Such factor may also contribute to explain our results when compared to those of Pomar and co-workers.…”

Section: Discussionmentioning

confidence: 99%

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Growth, yield and physiology of Verticillium-inoculated pepper plants treated with ATAD and composted sewage sludge

et al. 2009

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A greenhouse experiment was conducted to investigate the impact of sanitized sewage sludges, ATAD (aerobic thermophilic autothermic digestion) and composted, on Verticillium-induced wilt in pepper plants (Capsicum annuum L. cv. Piquillo). Two doses of ATAD (15 and 30% v/v) and three of composted sludge (15, 30 and 45% v/v) were applied to a peatbased potting mix. Unamended substrate was included as control. Half of the plants were inoculated with V. dahliae, whereas the other half remained noninoculated. Result showed that ATAD and composted sludge increased growth and yield of non-inoculated plants. V. dahliae reduced net photosynthesis (P n ), mainly as a consequence of stomatal closure, 5 weeks after pathogen inoculation. The actual photosystem II efficiency was also reduced and consequently the electron transport rate (ETR). No photoinhibitory damage was observed at this time in diseased plants. At the end of the experiment, diseased plants showed lower plant biomass and fruit yield. ATAD sludge had little effect on the disease. Compost slightly alleviated Verticillium-induced wilt when applied at lower doses (15% v/v), which resulted in increased P n and ETR, and higher plant biomass and fruit yield. By contrast, higher doses of compost (45% v/v) enhanced the effect of the pathogen, which was related to the high substrate salinity in this treatment.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Growth, yield and physiology of Verticillium-inoculated pepper plants treated with ATAD and composted sewage sludge

et al. 2009

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“…lycopersici infection and correlations were made between the time post-inoculation (i.e. dpi) and the values of A s , g s and E. As dpi increased, A s , g s and E were reduced (Lorenzini et al, 1997). In the present study, A s , g s and E were measured earlier (i.e.…”

Section: Eff Ects Of F Oxysporum F Sp Lycopersici Infection Of Tomsupporting

confidence: 45%

“…Signifi cant diff erences in A s , g s and E between tomato plants inoculated with F. oxysporum f. sp. lycopersici and the non-inoculated controls were reported by Lorenzini et al (1997). A s , g s and E, were negatively aff ected by F. oxysporum f. sp.…”

Section: Eff Ects Of F Oxysporum F Sp Lycopersici Infection Of Tommentioning

confidence: 86%

Reaction of the native Greek tomato varieties ‘Chondrokatsari Messinias’ and ‘Katsari Santorinis’ to Fusarium oxysporum f. sp. lycopersici and Rhizoctonia solani infection

Darras

Kotsiras

Delis

et al. 2017

Hellenic Plant Protection Journal

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SummaryPlants have to cope with a number of biotic stresses among which, infectious diseases. The present study was conducted to investigate the reaction of two native Greek tomato vars, ‘Chondrokatsari Messinias’ and ‘Katsari Santorinis’, to infection by Fusarium oxysporum f. sp. lycopersici and Rhizoctonia solani. Disease symptoms, disease incidence and severity were recorded and the effects of infection on the number of flowers, the biomass production (fresh and dry weight), CO2assimilation, stomatal conductance and transpiration were also evaluated. Both tomato varieties were susceptible to F. oxysporum f. sp. lycopersici and R. solani infection. However, ‘Chondrokatsari Messinias’ was found to be less susceptible to F. oxysporum f. sp. lycopersici compared to ‘Katsari Santorinis’. Both pathogens negatively affected biomass production of var. ‘Chondrokatsari Messinias’ but not that of ‘Katsari Santorinis’. The number of fl owers produced by ‘Chondrokatsari Messinias’ was negatively affected by R. solani but not by F. oxysporum f. sp. lycopersici. Infection of both varieties by R. solani also caused reduction in the CO2assimilation, stomatal conductance and transpiration.

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“…In our work, the decrease in stomatal conductance in infected plants might be indicative of water stress and consequent photosynthetic reduction. No measurements of leaf water potential were undertaken in order to avoid an excessive defoliation that would alter sink-source relationships, but depression in photosynthetic activity due mainly to drought in plants inoculated with wilt fungi has been described by several authors [4,5,6,22,34].…”

Section: Discussionmentioning

confidence: 99%

Effect of fungal infection on leaf gas-exchange and chlorophyll fluorescence in Quercus ilex

et al. 2001

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-Experiments were conducted to study the susceptibility to infection by two fungal pathogens, Cryphonectria parasitica or Phomopsis spp. of undisturbed holm oaks (Quercus ilex) and the resprout from the stump of trees after excision of the shoot. Leaf gas-exchange and chlorophyll a fluorescence were recorded on plants growing in natural conditions for two years, as markers of disease progress at the first stages of infection. In infected plants, pathogen-induced stomatal closure limited photosynthesis and increased contribution of energy dissipating processes protecting PSII integrity, as shown by higher non-photochemical quenching (NPQ). Excision treatment reduced susceptibility to infection and favoured water availability in resprouts, which showed higher gasexchange rates.Quercus ilex / Cryphonectria parasitica /Phomopsis spp. / gas-exchange / chlorophyll fluorescence Résumé -Effet de l'infection fongique sur les échanges gazeux et la fluorescence de la chlorophylle chez Quercus ilex. Le but de ce travail est l'étude de la susceptibilité des plants élagués (cas du chêne vert), à l'infection par Cryphonectria parasitica et Phomopsis spp. Pendant deux années, les échanges gazeux et la fluorescence de la chlorophylle d'un groupe de plants croissants dans des conditions environnementales naturelles ont été étudiés. Ces paramètres ont été des marqueurs convenables de l'évolution de la maladie durant les premières étapes de l'infection. Chez les plants infectés, le progrès de la maladie a été mis en évidence par la réduction de l'assimilation de CO 2 et l'augmentation de la participation des processus de dissipation thermique de l'énergie révélée par un NPQ élevé (Non-photochemical quenching). L'élagage induit une diminution de la susceptibilité à l'infection et permet une haute disponibilité hydrique chez les rejets assurant ainsi des taux élevés d'échanges gazeux. Quercus ilex / Cryphonectria parasitica / Phomopsis

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Photosynthetic response of tomato plants to vascular wilt diseases

Cited by 73 publications

References 12 publications

Growth, yield and physiology of Verticillium-inoculated pepper plants treated with ATAD and composted sewage sludge

Growth, yield and physiology of Verticillium-inoculated pepper plants treated with ATAD and composted sewage sludge

Reaction of the native Greek tomato varieties ‘Chondrokatsari Messinias’ and ‘Katsari Santorinis’ to Fusarium oxysporum f. sp. lycopersici and Rhizoctonia solani infection

Effect of fungal infection on leaf gas-exchange and chlorophyll fluorescence in Quercus ilex

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